Cod sursa(job #303442)
Utilizator | Data | 9 aprilie 2009 20:46:59 | |
---|---|---|---|
Problema | Grigo | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.4 kb |
#include<stdio.h>
long n,m;
long long v[100005];
void read()
{
freopen("grigo.in","r",stdin);
freopen("grigo.out","w",stdout);
scanf("%ld%ld",&n,&m);
long ind,i;
for(i=1;i<=m;i++)
scanf("%d",&ind),v[ind]=1;
v[0]=1;
for(i=1;i<=n;i++)
{
if(!v[i])
v[i]=(v[i-1]*(i-1))%1000003;
else
v[i]=v[i-1];
}
printf("%lld\n",v[n]);
}
int main()
{
read();
return 0;
}